Do Ultrasonic Cat Repellers Affect Hedgehogs?

Do Ultrasonic Cat Repellers Affect Hedgehogs

It is not an easy task as a gardener to deter cats. Some people like to use technology and repelling methods like an ultrasonic cat repelled in their quest to deter cats. But do they impact other wildlife? Do ultrasonic cat repellers affect hedgehogs too?

Yes, ultrasonic cat repellers can affect hedgehogs in the same way they can affect other animals such as foxes, dogs and cats.

No experiments have been done that show that ultrasonic cat repellers affect hedgehogs. However, since these repellers affect dogs and cats, they are likely to affect hedgehogs too.

What Cat Repellents are Safe for Hedgehogs?

Gardeners are always worried about keeping cats out. Cats can become a problem for gardeners as they poop and pee in the soil. This affects the health and quality of plants.

Not only this, but cat poop is dangerous for human health as it contains parasites. It is important to repel cats. But, it would be best if you used ways to repel cats that are safe for hedgehogs too. 

Motion-Activated Sprinkler

If you still wish to go down the technology road, you can repel the cat by using a motion-activated sprinkler.

This is a good option if you are comfortable using technology. When a cat enters your garden, the sprinkler gets activated. Cats hate water, and just a few sprinkles will be enough to keep them away.

This method is not harmful to hedgehogs as they are not scared of water, and a few sprinkles will not hurt them. 

Strong Scents

There are other ways you can use to repel cats. The most important part of dealing with cats is to use scents. Cats have a strong sense of smell which makes them sensitive to powerful scents.

There are many scents that cats hate. For instance, you can avoid using citrus. Cats hate the smell of citrus. So, you can use lemon rinds, grapefruits, and oranges in your garden. You can also grind the rinds and sprinkle the powder in your soil. 

Do Cats Hate the Smell of Citrus


Moreover, you can create your own cat deterrent spray. You can make a spray by adding some citrus juice to the water. You can spray the mix on your plants and any place where cats come and go often. 

Do Ultrasonic Cat Repellents Affect Other Animals?

Other than hedgehogs, ultrasonic cat repellents can also affect other animals. Not only cats, but this method can also impact dogs. In addition, you may wish to look out for any pets you have if you plan on using ultrasonic cat repellents. 

Ultrasonic cat repellents work by emitting a sound that animals can hear, but humans do not. While this sound will not hurt ears, it can pose other problems.

If you have any pets in your home or have hedgehogs coming in constantly, it would be a good idea to do a test. Some animals can react badly to the device, while others face no problem. If there are any signs of distress and stress, you should never take them lightly. 

How to Know If Ultrasonic Cat Repellents Affects Animals

One important aspect of knowing the ultrasonic cat repellents is knowing when they are effective. Unfortunately, while this device may repel cats, it can also affect other wildlife and pets.

One of the drawbacks of using ultrasonic cat repellents is that you cannot control who the sound waves reach. 

If you have a pet dog, for instance, you will notice that it will start looking for the sound source. Some dogs, however, can give different reactions to the repellents.

Some of the common signs include being stressed and distressed because of the noise. Moreover, animals can become more alert to their sounds or start making sounds to make the noise go away. Some animals are sensitive and will not be able to handle the sound.

If that is a problem, you will need to look for other ways to repel cats.


One prevalent problem for gardeners is repelling cats. Unlike other pests such as certain insects, you will have to look for ways to repel which do not harm them. One of the ways in which you can keep cats away from your garden is to use ultrasonic cat repellers.

These work to emit a noise that cats hate. However, the downside is that this can also affect hedgehogs and other animals. 

Hence, it would be good to use cat repellents that do not harm animals. For instance, you can use citrus rinds in your garden, which cats do not like or make a spray using lemon juice. It would help to use water sprinklers or cover any openings which may provide cats with easy access to your garden.

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